NASA
NASA | Landsat - From the Archives
The Landsat program is the longest continuous global record of Earth observations from space -- ever. On July 23, 1972 NASA launched the first satellite in this program, then known as ERTS, the Earth Resources Technology Satellite and...
Sophia Learning
Sophia: Us Cities: Lesson 2
This lesson will define colonial settlement and urban expansion, as well as urban decentralization and urban expansion. It is 2 of 4 in the series titled "US Cities."
Sophia Learning
Sophia: Us Cities: Lesson 3
This lesson will define colonial settlement and urban expansion, as well as urban decentralization and urban expansion. It is 3 of 4 in the series titled "US Cities."